The Sumerians were a non-Semitic caucasoid people, and spoke a language isolate; a number of linguists believed they could detect a substrate language beneath Sumerian, because names of some of Sumer's major cities are not Sumerian, revealing influences of earlier inhabitants. However, the archaeological record shows clear uninterrupted cultural continuity from the time of the early Ubaid period (5300 – 4700 BC C-14) settlements in southern Mesopotamia. The Sumerian people who settled here farmed the lands in this region that were made fertile by silt deposited by the Tigris and the Euphrates rivers.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When were settlements started in southern Mesopotamia?
Ah, so.. early Ubaid period

It was at Port Said that Nasser saw a confrontation with the invading forces as being the strategic and psychological focal point of Egypt's defense. A third infantry battalion and hundreds of national guardsmen were sent to the city as reinforcements, while two regular companies were dispatched to organize popular resistance. Nasser and Boghdadi traveled to the canal zone to boost the morale of the armed volunteers. According to Boghdadi's memoirs, Nasser described the Egyptian Army as "shattered" as he saw the wreckage of Egyptian military equipment en route. When British and French forces landed in Port Said on 5–6 November, its local militia put up a stiff resistance, resulting in street-to-street fighting. The Egyptian Army commander in the city was preparing to request terms for a ceasefire, but Nasser ordered him to desist. The British-French forces managed to largely secure the city by 7 November. Between 750 and 1,000 Egyptians were killed in the battle for Port Said.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): In what state was the Egyptian army after fighting the French and UK?
Ah, so.. shattered

A literature compendium for a large variety of audio coding systems was published in the IEEE Journal on Selected Areas in Communications (JSAC), February 1988. While there were some papers from before that time, this collection documented an entire variety of finished, working audio coders, nearly all of them using perceptual (i.e. masking) techniques and some kind of frequency analysis and back-end noiseless coding. Several of these papers remarked on the difficulty of obtaining good, clean digital audio for research purposes. Most, if not all, of the authors in the JSAC edition were also active in the MPEG-1 Audio committee.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Where were most of the papers in the JSAC edition?
Ah, so..
unanswerable